日本地球惑星科学連合2019年大会

講演情報

[E] ポスター発表

セッション記号 P (宇宙惑星科学) » P-EM 太陽地球系科学・宇宙電磁気学・宇宙環境

[P-EM13] 内部磁気圏

2019年5月29日(水) 15:30 〜 17:00 ポスター会場 (幕張メッセ国際展示場 8ホール)

コンビーナ:海老原 祐輔(京都大学生存圏研究所)、Danny Summers(Memorial University of Newfoundland)、三好 由純(名古屋大学宇宙地球環境研究所)、齊藤 慎司(名古屋大学 大学院理学研究科)

[PEM13-P24] Space Weather Effects on Energetic Proton Flux Response in South Atlantic Anomaly

*Kirolosse Mina GIRGIS1,2Tohru Hada1Shuichi Matsukiyo1 (1.Earth System Science and Technology (ESST) Department, Interdisciplinary Graduate School of Engineering Sciences (IGSES), Kyushu University, Japan、2.Aerospace Engineering Department, Faculty of Engineering, Cairo University, Egypt)

キーワード:South Atlantic Anomaly, Space Weather, Dst Index, Radiation Dose, Proton Flux

In this research, energetic proton flux in the inner radiation belt, is studied inside the South Atlantic Anomaly (SAA) by performing test particle simulations, where the background time-varying magnetic field is provided by Tsyganenko model, according to Dst index and altitudes. The objective of this investigation, is to estimate and forecast the additional radiation dose, occurring on spacecraft and human bodies, due to their passage inside the anomaly, and precisely, during intense solar storms. It was found that within minutes, proton flux in the SAA, penetrated deeper downward by about 200 km, when the Dst index is decreased (< -210 nT), and a after few more minutes, it was significantly reduced at all the altitudes; the last conclusion was confirmed by satellite observations.